\begin{thebibliography}{9}

\bibitem{fpedrochev}
  http://personales.upv.es/\~ pedroche/inv/ \_docs/fpedrochev4(sema).pdf

\bibitem{Kleinberg}
Jon M. Kleinberg. Authoritative sources in a hyperlinked environment. J. ACM,
46(5):604,632, September 1999.

\bibitem{Bryan y Leise}
Kurt Bryan and Tanya Leise. The linear algebra behind google. SIAM Review, 48(3):569
581, 2006.

\bibitem{Burden y Faires}
Burdan y Faires, Numerical Analysis, 3rd edition, 453
467, 2002.

\bibitem{Kamvar}
Kamvar, Haveliwala - 2003 - Extrapolation methods for accelerating PageRank computations


\end{thebibliography}